Add option to go to start if playback started on timeline end

Can be enabled in Settings.

BUG: 353051
Related to #973  and #1009

src/kdenlivesettings.kcfg

@@ -322,6 +322,11 @@
       <default>true</default>
     </entry>
 
+    <entry name="jumptostart" type="Bool">
+      <label>Jump to timeline start if playback is started on last frame in timeline.</label>
+      <default>false</default>
+    </entry>
+
     <entry name="pauseonseek" type="Bool">
       <label>Pause playback when seeking.</label>
       <default>true</default>

src/monitor/glwidget.cpp

@@ -1614,7 +1614,7 @@ void GLWidget::switchPlay(bool play, int offset, double speed)
         resetZoneMode();
     }
     if (play) {
-        if (m_id == Kdenlive::ClipMonitor && m_consumer->position() == m_producer->get_out() - offset && speed > 0) {
+        if ((m_id == Kdenlive::ClipMonitor || (m_id == Kdenlive::ProjectMonitor && KdenliveSettings::jumptostart())) && m_consumer->position() == m_producer->get_out() - offset && speed > 0) {
             m_producer->seek(0);
         }
         qDebug() << "pos: " << m_consumer->position() << "out-offset: " << m_producer->get_out() - offset;

src/ui/configtimeline_ui.ui

@@ -6,12 +6,12 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>575</width>
+    <width>589</width>
     <height>532</height>
    </rect>
   </property>
   <layout class="QGridLayout" name="gridLayout">
-   <item row="9" column="0" colspan="4">
+   <item row="11" column="0" colspan="4">
     <widget class="QGroupBox" name="groupBox_2">
      <property name="title">
       <string>Raise properties pane when selecting in timeline</string>
@@ -54,7 +54,7 @@
      </layout>
     </widget>
    </item>
-   <item row="10" column="0">
+   <item row="12" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -67,6 +67,34 @@
      </property>
     </spacer>
    </item>
+   <item row="6" column="0" colspan="3">
+    <widget class="QCheckBox" name="kcfg_verticalzoom">
+     <property name="text">
+      <string>Zoom using vertical drag in ruler</string>
+     </property>
+    </widget>
+   </item>
+   <item row="7" column="0" colspan="3">
+    <widget class="QCheckBox" name="kcfg_scrollvertically">
+     <property name="text">
+      <string>Scroll vertically with scroll wheel, horizontally with Shift + scroll wheel</string>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0" colspan="2">
+    <widget class="QCheckBox" name="kcfg_showmarkers">
+     <property name="text">
+      <string>Display clip markers comments</string>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="0" colspan="4">
+    <widget class="QCheckBox" name="kcfg_autoscroll">
+     <property name="text">
+      <string>Autoscroll while playing</string>
+     </property>
+    </widget>
+   </item>
    <item row="0" column="0" colspan="4">
     <widget class="QGroupBox" name="groupBox">
      <property name="title">
@@ -113,7 +141,14 @@
      </layout>
     </widget>
    </item>
-   <item row="8" column="0" colspan="4">
+   <item row="1" column="0" colspan="4">
+    <widget class="QCheckBox" name="kcfg_ffmpegaudiothumbnails">
+     <property name="text">
+      <string>Use FFmpeg for audio thumbnails (faster)</string>
+     </property>
+    </widget>
+   </item>
+   <item row="10" column="0" colspan="4">
     <widget class="QGroupBox" name="groupBox_3">
      <property name="title">
       <string>Multi stream audio clips</string>
@@ -161,14 +196,14 @@
      </layout>
     </widget>
    </item>
-   <item row="1" column="0" colspan="4">
-    <widget class="QCheckBox" name="kcfg_ffmpegaudiothumbnails">
+   <item row="4" column="0" colspan="4">
+    <widget class="QCheckBox" name="kcfg_pauseonseek">
      <property name="text">
-      <string>Use FFmpeg for audio thumbnails (faster)</string>
+      <string>Pause playback when seeking</string>
      </property>
     </widget>
    </item>
-   <item row="7" column="0" colspan="4">
+   <item row="9" column="0" colspan="4">
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <item>
       <widget class="QLabel" name="label">
@@ -205,38 +240,10 @@
      </item>
     </layout>
    </item>
-   <item row="3" column="0" colspan="4">
-    <widget class="QCheckBox" name="kcfg_autoscroll">
-     <property name="text">
-      <string>Autoscroll while playing</string>
-     </property>
-    </widget>
-   </item>
-   <item row="4" column="0" colspan="4">
-    <widget class="QCheckBox" name="kcfg_pauseonseek">
-     <property name="text">
-      <string>Pause playback when seeking</string>
-     </property>
-    </widget>
-   </item>
-   <item row="5" column="0" colspan="3">
-    <widget class="QCheckBox" name="kcfg_verticalzoom">
-     <property name="text">
-      <string>Zoom using vertical drag in ruler</string>
-     </property>
-    </widget>
-   </item>
-   <item row="6" column="0" colspan="3">
-    <widget class="QCheckBox" name="kcfg_scrollvertically">
-     <property name="text">
-      <string>Scroll vertically with scroll wheel, horizontally with Shift + scroll wheel</string>
-     </property>
-    </widget>
-   </item>
-   <item row="2" column="0" colspan="2">
-    <widget class="QCheckBox" name="kcfg_showmarkers">
+   <item row="5" column="0">
+    <widget class="QCheckBox" name="kcfg_jumptostart">
      <property name="text">
-      <string>Display clip markers comments</string>
+      <string>Jump to timeline start if playback is started on last frame in timeline</string>
      </property>
     </widget>
    </item>